Datun Mountain (Chinese: 大屯山; pinyin: Dà tún shān) is a mountain located in the Yangmingshan National Park.

With a height of 1,092 m (3,583 ft),[1] it is the park's 3rd tallest mountain and is located in the Tatun Volcano Group.

It is one of Taiwan's two active volcanoes, with the other being on Guishan Island off the coast of Yilan.

The latest eruption occurred 5,000-6,000 years ago.

It has an elevation gain of 247 m (810 ft) and takes around 1.5–2 hours round-trip.